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FCC
gasoline hydrofining technology
to produce ethylene feed
Background
Most
FCC feeds are of high sulfur and high ratio of residue
blended, which result in high sulfur and olefin contents
exist in FCC gasoline. For refineries who need more
ethylene feeds, this kind of FCC gasoline can be treated
with hydrofining process, the hydrofined naphtha is of
good quality containing more saturated hydrocarbons,
through which high sulfur content problem of gasoline is
resolved. Belows are the typical operating conditions:
Pressure:
2.0-8.0MPa
Temperature:
280-320≧
LHSV:
1.5-3.0h-1
H2/oil(v/v):
200-400
Aimed at
Refiners
who needs maximal naphtha while FCC gasoline has high
sulfur content.
Typical
results
Pilot
plant results
|
Items |
Feed |
Case-1 |
Case-2 |
|
Operating
conditions
H2
partial pressure/MPa
Temperature/≧
LHSV/h-1
H2/oil(v/v) |
|
3.3
300
1.5
400
|
2.0
300
1.5
400
|
|
Product
properties
Density/g/cm3
S/ppm
N/ppm
Bromine index/g-Br/100g
Alkane/m%
Naphthene/m%
Olefins/m%
Aromatics/m% |
0.7184
15
33
47.4
41.98
8.94
28.38
20.70
|
0.7083
<0.5
1.0
0.06
67.66
13.90
1.34
17.10
|
0.7089
<0.5
5
0.10
65.58
12.06
1.96
20.40
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Costs
of investment and operation
The
implementation of FCC gasoline hydrofining technology to
produce ethylene feed can be based on revamping existed
hydrofining plants.
For
constructing a new plant on a 0.2Mt/a base, capital cost
is around USD4.58M, operation costs is around USD11.8/ton
feed(including hydrogen cost).
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